Recently [mit41301] wondered about increasing the data capacity of QR codes, and was able to successfully triple the number of bits using color. He chose the new rectangular micro QR code (rMQR) ...

For the longest time we’ve been using UPC bar codes to store strings of information in a compact space on both product labels and people in dystopian sci-fi movies. But as our needs grew and became ...

As you probably know, we love our clocks here at Hackaday. Odd display technologies are always interesting to see, as are unusual encoding techniques such as binary, ternary or higher-radix number ...

MINNEAPOLIS (WCCO) --Square, black and white codes are popping up all over on products, in magazines, on buildings and business cards. QR codes, or quick response codes, link the outside world to the ...

I’m sure you’ve seen one before, maybe on a billboard or in the pages of a magazine. It’s one of those squares with the weird arrangement of black and white boxes, with all the little boxes forming an ...